Firm Great Value Adjustable Base Compatible Yes All Mattresses

Firm mattresses give you a solid, supportive surface with minimal sink — keeping your spine aligned and making it easier to move and get in and out of bed. They're the top choice for back and stomach sleepers, heavier bodies, and anyone who finds softer beds uncomfortable. Compare every firm option below by brand, profile, and price.
Great Value mattresses deliver dependable comfort and support at our most affordable prices — a smart pick for guest rooms, kids' rooms, students, and budget-minded shoppers. Compare every great-value option below by brand, type, and feel.
These mattresses are built to flex with adjustable bed bases — bending smoothly at the head and foot without damage — so you can raise, recline, and find your ideal position. Compare every adjustable-base-compatible option below by brand, type, and feel.

Shop 200+ mattresses from Serta, Beautyrest, Sealy, Tempur-Pedic, Springwall, and Stearns & Foster at National Mattress — available in Single/Twin through King sizes from $99 to $6,640. Choose from innerspring, euro-top, memory foam, hybrid, and latex constructions in four firmness levels from extra firm to plush. Every mattress is manufactured in Canadian factories using CertiPUR-US® certified foams and ships free across Canada with a 365-night sleep trial, price match guarantee, and manufacturer warranty coverage up to 25 years.

Firm Great Value Adjustable Base Compatible Yes All Mattresses
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  • NM 6" Firm Tight Top Foam Mattress NM 6" Firm Tight Top Foam Mattress brand icon
    • High Density Foam Core
    • High Density Foam Comfort Layer
    • Cotton Channel Quilted Cover
    • 5 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $177
    Twin XL $238
    Double/Full $243
    Queen $260
    Compare at $599
    Online availability icon In-Stock
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  • SEALY® Essentials 6" Firm Tight Top Foam Mattress SEALY® Essentials 6" Firm Tight Top Foam Mattress brand icon
    • CleanProtect™ Fabric
    • SealyLoft™ Quilt with Moisture Wicking Fibres
    • CertiPUR-US™ SealySupport™ HD Foam
    • CertiPUR-US™ SealySupport™ HD Core
    • SealySupport™ HD Foam
    Single/Twin $208
    Twin XL $243
    Double/Full SOLD OUT
    Queen $298
    Compare at $799
    King $490
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  • NM 10" Firm Euro Top Mattress NM 10" Firm Euro Top Mattress brand icon
    • 1000 Hi-Loft Pocket Coil with Foam Encased Perimiter
    • Cool Gel-infused memory foam
    • Bio-Foam natural foam content reduces your carbon footprint
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $296
    Twin XL $382
    Double/Full $388
    Queen SOLD OUT
    Compare at $799
    King $581
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  • SPRINGWALL® Comfort Pockets® 10" Firm Euro-Top Mattress SPRINGWALL® Comfort Pockets® 10" Firm Euro-Top Mattress brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Single/Twin SOLD OUT
    Twin XL $356
    Double/Full $361
    Queen $418
    Compare at $899
    RV Short Queen SOLD OUT
    King SOLD OUT
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  • SPRINGWALL® Comfort Pockets® Elite 14" Firm Tight-Top Mattress SPRINGWALL® Comfort Pockets® Elite 14" Firm Tight-Top Mattress brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Cool Touch Stretch Knit Sleep Surface
    • Bio Comfort Quilted Stretch knit surface
    • HD Medium & Firm Layers of Bio Comfort Foam
    • Made In Canada
    Single/Twin $369
    Twin XL $494
    Double/Full $501
    Queen $565
    Compare at $1,299
    RV Short Queen $729
    King $757
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  • SEALY® Essentials 11.5" Firm Eurotop Mattress SEALY® Essentials 11.5" Firm Eurotop Mattress brand icon
    • CleanProtect™ Fabric
    • SealyLoft™ Quilt with Moisture Wicking Fibres
    • CertiPUR-US™ SealySupport™ HD Foam
    • Posture Touch® Pocket Coils
    • EssentialEdge™ Foam Support
    Single/Twin SOLD OUT
    Twin XL $382
    Double/Full SOLD OUT
    Queen $399
    Compare at $1,099
    King SOLD OUT
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  • SPRINGWALL® HC Flippable 11" Firm Tight-Top Mattress SPRINGWALL® HC Flippable 11" Firm Tight-Top Mattress brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Single/Twin $386
    Twin XL $520
    Double/Full $528
    RV Short Queen $564
    Queen $610
    Compare at $1,299
    King SOLD OUT
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  • NM 10″ Firm Memory Foam Mattress NM 10″ Firm Memory Foam Mattress brand icon
    • Optimal High Resilient Bio-Foam Core
    • Visco Memory Foam
    • Pressure Relieving Comfort Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $397
    Twin XL $548
    Double/Full $553
    Queen SOLD OUT
    Compare at $1,199
    King $887
    Online availability icon In-Stock
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  • BEAUTYREST® BeautySleep® 10" Firm Tight Top Mattress BEAUTYREST® BeautySleep® 10" Firm Tight Top Mattress brand icon
    • 815 Original Beautyrest® Pocketed Coil®
    • Gel-Infused Fibre Blend
    • AirFeel® Foam
    • Gel Foam
    • High-Density Foam Encasement
    Single/Twin SOLD OUT
    Twin XL $469
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,499
    King $736
    Online availability icon In-Stock Only 6 left!
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  • SERTA® Classic® 10" Firm Tight Top Mattress SERTA® Classic® 10" Firm Tight Top Mattress brand icon
    • 800 Edition Custom Support Coil System
    • 3 Zone Body Support
    • Serta® Support Foam
    • Serta® Anti-Microbial Fibre Technology
    • Serta® Best Edge® Foam Encasement
    • Designed and Made in Canada
    Single/Twin SOLD OUT
    Twin XL $510
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,499
    King SOLD OUT
    Online availability icon In-Stock Only 4 left!
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  • OPEN BAG - NM 6" Firm Tight Top Foam Mattress - Twin XL OPEN BAG - NM 6" Firm Tight Top Foam Mattress - Twin XL brand icon
    • High Density Foam Core
    • High Density Foam Comfort Layer
    • Cotton Channel Quilted Cover
    • 5 Year Warranty
    • Made In Toronto, Canada
    Twin XL $147
    Compare at $499
    Online availability icon In-Stock Only 1 left!
    In-Store availability icon On Display:
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  • NM 6" Firm Tight Top Foam Mattress - Single/Twin NM 6" Firm Tight Top Foam Mattress - Single/Twin brand icon
    • High Density Foam Core
    • High Density Foam Comfort Layer
    • Cotton Channel Quilted Cover
    • 5 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $177
    Compare at $399
    Online availability icon In-Stock
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